KR100840470B1 - Vertical alignment liquid crystal display device - Google Patents

Abstract

The present invention relates to a vertical alignment type active matrix liquid crystal display device using a thin film transistor (hereinafter referred to as TFT) as an active device.

The liquid crystal display device includes an opposing substrate having opposing electrodes formed on one side of an inner surface facing each other, a plurality of pixel electrodes arranged in a matrix, a thin film transistor connected to each pixel electrode, and a gate wiring and data wiring of the thin film transistor. A TFT substrate, a vertical alignment film formed on a surface of the substrate facing each other, and a liquid crystal layer having negative dielectric anisotropy disposed between the vertical alignment films, wherein the plurality of pixel electrodes include one pixel and a plurality of subpixels. In order to classify as, a slit from which a portion of the pixel electrode is removed is formed by leaving a connection portion connecting one pixel electrode to an area of an adjacent electrode portion, and the width W ₁ of the pixel electrode of the portion where the slit is formed is formed. The value of the ratio W ₂ / W ₁ of the width W ₂ of the connecting portion is characterized by being 0.13 or less.

Pixel electrode, counter electrode, auxiliary electrode, TFT, gate wiring, vertical alignment film

Description

Vertical alignment liquid crystal display device {VERTICAL ALIGNMENT LIQUID CRYSTAL DISPLAY DEVICE}

1 is a plan view of a portion of one substrate of a liquid crystal display device showing a first embodiment of this invention.

FIG. 2 is a cross-sectional view of the liquid crystal display device taken along the line II-II of FIG. 1.

3 is a cross-sectional view of the liquid crystal display device taken along the line III-III of FIG.

Fig. 4 is a plan view schematically showing a liquid crystal molecular alignment state when voltage is applied to each region corresponding to the plurality of electrode portions of the pixel electrode in the liquid crystal display element of the first embodiment.

Fig. 5 is a plan view of a portion of one substrate of the liquid crystal display device showing the second embodiment of this invention.

Fig. 6 is a plan view schematically showing a liquid crystal molecule alignment state when voltage is applied to each region corresponding to the electrode portion due to the position of the connecting portion of the plurality of electrode portions of the pixel electrode.

Fig. 7 is a plan view of one pixel portion of one substrate of the liquid crystal display device showing the third embodiment of this invention.

Fig. 8 is a plan view of one pixel portion of one substrate of the liquid crystal display element showing the fourth embodiment of the present invention.

Fig. 9 is a plan view of one pixel portion of one substrate of the liquid crystal display device showing the fifth embodiment of this invention.

Fig. 10 is a plan view of a portion of one substrate of the liquid crystal display device showing the sixth embodiment of the present invention.

FIG. 11 is a cross-sectional view of the liquid crystal display device taken along the line VI-XI of FIG. 10. FIG.

FIG. 12 is a cross-sectional view of the liquid crystal display device taken along the line II-II of FIG. 10. FIG.

Fig. 13 is a plan view schematically showing a liquid crystal molecule alignment state when voltage is applied to one pixel in the liquid crystal display element of the sixth embodiment;

Fig. 14 is a sectional view schematically showing a liquid crystal molecule alignment state when voltage is applied to one pixel in the liquid crystal display element of the sixth embodiment.

※ Explanation of symbols for main parts of drawing

1, 2: substrate 3: pixel electrode

6: TFT 7: gate electrode

12: gate wiring 13: data wiring

16, 20: vertical alignment layer 17: counter electrode

21: liquid crystal layer 141, 142: auxiliary electrode

The present invention relates to a vertically aligned active matrix liquid crystal display device using a thin film transistor (hereinafter referred to as TFT) as an active device.

In the vertical alignment type active matrix liquid crystal display device, a pair of substrates facing each other with a predetermined gap therebetween and a pair of substrates are provided on an inner surface of one of the substrates facing each other, and arranged in a matrix in row and column directions. A plurality of pixel electrodes arranged in a row, a plurality of TFTs provided on an inner surface of the one substrate to correspond to the plurality of pixel electrodes, respectively, connected to a corresponding pixel electrode, and each pixel electrode row on an inner surface of the one substrate. A plurality of gate wirings and data wirings respectively provided between and between the pixel electrode columns and supplying gate signals and data signals to the TFTs in the rows and columns, and the plurality of pixel electrodes on the inner surface of the other substrate, respectively. A counter electrode disposed to face each other; a vertical alignment layer formed by covering the electrodes on inner surfaces of the front and rear substrates; and the front and rear substrates. It consists of a liquid crystal layer having a negative dielectric anisotropy of the encapsulated in the gap between the substrates.

The vertical alignment liquid crystal display device displays an image by causing liquid crystal molecules to fall down from a vertical alignment state by applying a voltage between the electrodes for a plurality of pixels each having a region where the plurality of pixel electrodes and the counter electrodes face each other. The liquid crystal molecules of each pixel are oriented so as to fall down with respect to the substrate surface by applying the voltage.

Such a vertical alignment liquid crystal display device is disturbed in a collapsed alignment state in which liquid crystal molecules are oriented according to voltages applied to each pixel, and display stains are generated.

Therefore, it is proposed to form a plurality of domains in which liquid crystal molecules are aligned in a plurality of directions for each pixel in order to stabilize the alignment state for each pixel and to obtain wide viewing angle characteristics. For example, as described in Japanese Patent No. 2565639, when an X-shaped opening is formed in a counter electrode, and a voltage is applied between two opposing electrodes, the liquid crystal molecules in one pixel are the X-shaped. There is a liquid crystal display device which is oriented to fall in four directions toward the center of the opening.

However, in the above-described liquid crystal display device, since the alignment direction is formed by the X-shaped openings formed in each pixel, the X-shaped openings need to be formed to have a sufficiently wide width in order to break the interaction between the regions. Therefore, in each pixel, there is a problem that the area of the opening which cannot be controlled by the electric field is large, the area of the opposing electrode decreases, and the opening ratio is low.

An object of the present invention is to vertically align the liquid crystal molecules of each pixel by applying a voltage stably so that the display is bright and a good quality image can be displayed at a wide viewing angle without display stains. To provide.

In order to achieve the above object, the liquid crystal display device according to the first aspect of the present invention

A pair of substrates facing each other by providing a predetermined gap;

At least one counter electrode formed on an inner surface of one of the substrates, wherein the pair of substrates face each other;

The pair of substrates are arranged in a matrix form in a row direction and a column direction on the inner surface of the other substrate among the inner surfaces facing each other, and each pixel is defined by a region facing the opposite electrode, respectively. Electrodes] a pixel electrode is divided into a plurality of electrode portions and the pixel electrode is divided into a plurality of subpixels so that the pixel electrode is left with a connection portion having a predetermined width connecting an area of an electrode portion adjacent to one pixel electrode. A plurality of pixel electrodes in which at least one slit from which a part of the slit is removed is formed, and the width of the connection portion is smaller than 1/5 with respect to the width of the pixel electrode in the slit formed portion;

A plurality of thin film transistors disposed on an inner surface of the one substrate so as to correspond to the plurality of pixel electrodes, respectively, and connected to the corresponding pixel electrodes;

A plurality of gate wirings and data wirings provided on the inner surface of the one substrate between the rows and columns of the plurality of pixel electrodes, for supplying a gate signal and a data signal to the thin film transistors of the respective rows and columns;

A vertical alignment film disposed on the inner surfaces of the one substrate and the other substrate to cover the pixel electrode and the counter electrode, respectively;

And a liquid crystal layer having negative dielectric anisotropy enclosed in a gap between the pair of substrates.

In the liquid crystal display device according to the first aspect of the present invention, an area of an electrode part adjacent to one pixel electrode is used to divide the pixel electrode into a plurality of electrode parts and divide the pixel into a plurality of subpixels. At least one slit from which a portion of the pixel electrode is removed is formed leaving a connecting portion having a predetermined width for connecting the slit, and the width of the connecting portion is formed to be smaller than 1/5 of the width of the pixel electrode of the portion where the slit is formed. The liquid crystal molecules of each pixel are not affected by the arrangement of the liquid crystal molecules in the regions corresponding to the adjacent electrode portions, and the centers of the peripheral portions of the respective pixels corresponding to the plurality of electrode portions of the pixel electrodes are applied by the application of voltage. It can stably align to the surface, and can display an image of good quality without roughness, and also decreases the aperture ratio of each pixel. Key may be displayed, a bright image without.

In this liquid crystal display device, the width of the pixel electrode in the portion where the slit is formed is set to W ₁ , and the width W ₂ of the connection portion connecting one electrode electrode to the adjacent electrode portion is set to W ₁ . In this case, it is preferable that the width W ₁ of the pixel electrode and the width W ₂ of the connection portion are set to a value satisfying W ₂ / W ₁ ≤ 0.13.

In addition, the width of the slit of the pixel electrode is preferably 4.0 μm or less.

In this liquid crystal display device, each pixel electrode is formed in an elongate shape having a short side and a long side, and a thin film transistor is connected to one end of the short side of the pixel electrode, and the short side of the pixel electrode. It is preferable that at least one slit is provided extending in a direction parallel to the and separating the pixel electrode into a plurality of electrode portions, and each of the electrode portions separating the plurality of pixel electrodes is formed in a substantially square shape. It is desirable to have.

The liquid crystal display device which consists of a 2nd viewpoint of this invention is

A pair of substrates facing each other by providing a predetermined gap;

At least one counter electrode formed on an inner surface of one of the inner surfaces of the pair of substrates facing each other;

The pair of substrates are arranged in a matrix in a row direction and a column direction on the inner surface of the other substrate among the inner surfaces facing each other, and each pixel defines one pixel by a region facing the opposite electrode. Pixel electrode, in which the pixel electrode is divided into a plurality of electrode parts and the pixel is divided into a plurality of sub-pixels. At least one slit from which a part of the electrode is removed is formed, and the plurality of pixels in which the connection portion is shifted from one of the width directions in the width direction of the electrode portion from the center portion in the width direction of the pixel electrode in the portion where the slit is formed With electrodes,

A plurality of thin film transistors disposed on an inner surface of the one substrate so as to correspond to the plurality of pixel electrodes, respectively, and connected to the corresponding pixel electrodes;

A plurality of gate wirings and data wirings provided on the inner surface of the one substrate between the rows and columns of the plurality of pixel electrodes, for supplying a gate signal and a data signal to the thin film transistors of the respective rows and columns;

A vertical alignment film disposed on the inner surfaces of the one substrate and the other substrate to cover the pixel electrode and the counter electrode, respectively;

And a liquid crystal layer having negative dielectric anisotropy enclosed in a gap between the pair of substrates.

In the liquid crystal display device according to the second aspect, the pixel electrodes are divided into a plurality of electrode portions to each of the pixel electrodes, and one pixel electrode is connected to an area of the electrode portion adjacent to each other in order to divide the one pixel into a plurality of subpixels. At least one slit from which a part of the pixel electrode is removed is formed leaving a connection part having a predetermined width, wherein the connection part is in the width direction of the electrode part from the center part of the width direction of the pixel electrode of the part where the slit is formed. Since the liquid crystal molecules of each pixel are disposed at a position shifted to one side, the respective regions corresponding to the plurality of electrode portions of the pixel electrode by the application of voltage without being affected by the arrangement of the liquid crystal molecules of the regions corresponding to the adjacent electrode portions. Each time, it aligns stably from the circumference toward the center and shows an image of good quality without roughness. In addition, a bright image can be displayed without lowering the aperture ratio of each pixel.

In this liquid crystal display device, each pixel electrode is formed in an elongate shape having a short side and a long side, and a thin film transistor is connected to one end of the short side of the pixel electrode, At least one slit extending in a parallel direction and for dividing the pixel electrode into a plurality of electrode portions is provided, and a connection portion connecting the plurality of electrode portions includes a long side of the side of the pixel electrode to which the thin film transistor is connected. Is preferably formed on the long side of the opposite side. In this case, the pixel electrode has an elongated shape having a long side substantially three times as long as the short side, and the slit is divided into at least two electrode parts in the long side direction of the pixel electrode. It is preferable that the plurality of connecting portions are alternately formed on opposite sides of the long side of the pixel electrode.

In this liquid crystal display device, the pixel electrode is formed into a substantially rectangular shape having a short side and a long side, and a thin film transistor is connected to one end of the short side of the pixel electrode, and the short side of the pixel electrode. A plurality of slits are provided which divide the pixel electrodes into a plurality of electrode portions arranged side by side in two rows and two rows along a direction and a long side direction, and each of the plurality of electrode portions and adjacent to each other in the same column as the electrode portion are provided. It is preferable that the connection part which connects the mutually adjacent electrode part is formed between an electrode part and adjacent electrode parts of the same row. In this case, an electrode portion of the plurality of electrode portions, to which the thin film transistors are connected, and a connection portion connecting the electrode portion and the neighboring electrode portion are formed on a short side other than the long side of the side where the thin film transistor of the pixel electrode is connected. It is desirable to have.

In this liquid crystal display device, it is preferable that each of the electrode portions in which the pixel electrodes are divided into a plurality is formed in a substantially square shape.

In addition, the liquid crystal display element further includes a pixel corresponding to a peripheral portion of the plurality of pixel electrodes between the substrate surface of the other substrate provided with the plurality of pixel electrodes and the forming surface of the pixel electrode so that a part thereof overlaps. It is preferable to further include a compensation capacitor electrode which is arranged insulated from the electrode, to form a compensation capacitor between the pixel electrode, and to form a region of an electric field of a predetermined value between the counter electrode. A predetermined value between the counter electrode of the other substrate and the counter electrode corresponding to the slit of the plurality of pixel electrodes between the substrate surface of the other substrate and the formation surface of the pixel electrode; It is preferable to have an auxiliary electrode for forming an electric field of. Also preferably, both of the compensation capacitor electrode and the auxiliary electrode.

The liquid crystal display device which consists of 3rd viewpoint of this invention is

A pair of substrates facing each other by providing a predetermined gap;

At least one counter electrode formed on an inner surface of one of the substrates, wherein the pair of substrates face each other;

The pair of substrates are arranged in a matrix form in a row direction and a column direction on the inner surface of the other substrate among the inner surfaces facing each other, and each pixel defines one pixel by a region facing the opposite electrode. Pixel electrode), in which a pixel electrode is divided into a plurality of electrode portions, and one pixel is divided into a plurality of sub-squares having a substantially square shape. A plurality of pixel electrodes in which at least one slit is formed in which a portion of the pixel electrode is removed while leaving a connecting portion having a width;

A plurality of thin film transistors disposed on an inner surface of the one substrate so as to correspond to the plurality of pixel electrodes, respectively, and connected to the corresponding pixel electrodes;

A plurality of gate wirings and data wirings disposed on inner surfaces of the one substrate between the rows and columns of the plurality of pixel electrodes, respectively, for supplying a gate signal and a data signal to the thin film transistors of the respective rows and columns;

A vertical alignment film disposed on the inner surfaces of the one substrate and the other substrate to cover the pixel electrode and the counter electrode, respectively;

A liquid crystal layer having negative dielectric anisotropy enclosed in a gap between the pair of substrates,

A peripheral portion of the plurality of pixel electrodes and an insulated part of the plurality of pixel electrodes between the substrate surface of the other substrate on which the plurality of pixel electrodes are provided and the forming surface of the pixel electrode and insulated from the pixel electrodes in correspondence with the slit; And an auxiliary electrode for forming a region for generating an electric field having a predetermined value therebetween.

In the liquid crystal display device of this third aspect, one pixel electrode is provided in each pixel electrode so as to divide the pixel electrode into a plurality of electrode parts and divide the pixel into a plurality of sub-pixels having a substantially square shape. Forming at least one slit from which a part of the pixel electrode is removed leaving a connection portion having a predetermined width connecting the regions of the adjacent electrode portions, and forming the pixel surface and the substrate surface of the other substrate provided with a plurality of pixel electrodes. An auxiliary electrode disposed between the surface and the peripheral portion of the plurality of pixel electrodes and insulated from the pixel electrode in correspondence with the slit, and forming an area for generating an electric field having a predetermined value between the counter electrode; As a result, the liquid crystal molecules of each pixel are not affected by the arrangement of the liquid crystal molecules in the regions corresponding to the adjacent electrode portions. The respective regions corresponding to the plurality of electrode portions of the pixel electrode can be stably oriented from the peripheral edge portion toward the center to display an image of good quality without roughness, and to reduce the aperture ratio of each pixel. A bright image can be displayed without work.

In this liquid crystal display device, each pixel electrode is formed in an elongate shape having a short side and a long side, and a thin film transistor is connected to one end of the short side of the pixel electrode, At least one slit extending in a parallel direction and for dividing the pixel electrode into a plurality of electrode portions is provided, and a connection portion connecting the plurality of electrode portions includes a long side of the side of the pixel electrode to which the thin film transistor is connected. Is preferably formed on the long side of the opposite side.

In addition, it is preferable that the auxiliary electrode of the liquid crystal display device is disposed so as to overlap a part of the auxiliary electrode along the edge portion of each electrode portion separated by the slit and the peripheral electrode of the pixel electrode. It is preferable to form a compensation capacitor electrode for forming the compensation capacitor between the two. In addition, the auxiliary electrode is preferably set to the potential of the same value as the potential of the counter electrode.

In this liquid crystal display element, it is preferable to form projections provided at positions corresponding to the centers of the respective electrode portions separated by slits of the plurality of pixel electrodes of the other substrate, on the inner surface of one substrate on which the counter electrode is provided, By this configuration, a stable alignment state of the liquid crystal molecules is obtained for each region corresponding to each electrode portion of each pixel when voltage is applied.

(First embodiment)

1 to 4 show a first embodiment of the present invention, FIG. 1 is a plan view of a portion of a substrate on which a pixel electrode of a liquid crystal display device is formed, and FIGS. 2 and 3 are lines II-II and III- of FIG. It is sectional drawing of the liquid crystal display element along line III.

This liquid crystal display element is a vertically aligned active matrix liquid crystal display element using TFT as an active element, and as shown in Figs. 1 to 3, a pair of transparent substrates 1 and 2 facing each other with a predetermined gap are provided. Equipped. At least one transparent counter electrode is formed on an inner surface of one of the pairs of substrates 1 and 2 facing each other, for example, a substrate on the observation side (hereinafter referred to as a front substrate) 2. (17) is provided. On the inner surface of the pair of substrates 1 and 2 which are opposite to each other among the inner surfaces of the pair of substrates 1, 2, that is, the substrate opposite to the viewing side of the display (hereinafter referred to as a rear substrate) 1, the row direction A plurality of transparent pixel electrodes 3 arranged in a matrix in (left and right direction in FIG. 1) and in a column direction (up and down direction in FIG. 1), each defining one pixel by a region facing the counter electrode. And a plurality of TFTs 6 provided on the inner surface of the late plate 1 in correspondence with the plurality of pixel electrodes 3, respectively, connected to the corresponding pixel electrodes 3, and the late plate 1 A plurality of gate wirings 12 provided on an inner surface of each pixel electrode between a row of each pixel electrode and a column of each pixel electrode, for supplying a gate signal and a data signal to each of the TFTs 6 arranged in the row and column; The data wiring 13 is formed. Vertical alignment layers 16 and 20 formed on the inner surfaces of the pair of substrates 1 and 2 are formed to cover the electrodes 3 and 17. A gap between the pair of substrates 1 and 2 is negative dielectric anisotropy. The liquid crystal layer 21 which has a is sealed.

The plurality of TFTs 6 may include a gate electrode 7 formed on the substrate surface of the late plate 1 and a transparent gate formed over the entire array region of the pixel electrode 3 by covering the gate electrode 7. The insulating film 8, the i-type semiconductor film 9 formed on the gate insulating film 8 so as to face the gate electrode 7, and on one side and the other side of the i-type semiconductor film 9 are shown. And a drain electrode 10 and a source electrode 11 formed through an n-type semiconductor film.

The plurality of pixel electrodes 3 are provided on the gate insulating film 8. These pixel electrodes 3 have long long sides in the column direction (direction along the data wiring 13) and row direction (gate wiring) in order to increase the pixel density of the liquid crystal display device and increase the fineness. 12), and the length of the long side is formed into an elongated shape that is substantially three times as long as the length of the short side. The TFT 6 is disposed at one end of the edge of the short side of the elongated pixel electrode 3, and the source electrode 11 is disposed at the corresponding edge of the pixel electrode 3. It is connected to the part.

The plurality of pixel electrodes 3 are provided with slits 4 for dividing the pixel electrodes 3 into a plurality of electrode portions connected to each other at a portion of adjacent edge portions. That is, each pixel electrode 3 is provided with at least one slit for dividing the pixel electrode into a plurality of electrode portions and dividing the one pixel into a plurality of sub-pixels. It is formed by removing part of the pixel electrode 3, leaving the connecting portion 5 of a predetermined width connecting the regions of the adjacent electrode portions 3). Moreover, this slit 4 is formed in the width of 4.0 micrometers or less, for example.

In this embodiment, the pixel electrode 3 is formed into an elongated shape whose electrode width (short side length) is about 1/3 of the electrode length (long side length), and the length of the pixel electrode 3 is changed. The three electrode portions 3a, 3b, and 3c having substantially square shapes are formed by providing slits 4 along the width direction of the pixel electrode 3 at two substantially divided into three equal parts. ).

In this embodiment, the slits 4 are avoided in the middle of the width direction of the pixel electrode 3, and slit ends are provided at both sides of the pixel electrode 3 at both sides of the width direction. The connection part 5 of the electrode parts 3a, 3b, and 3c is formed.

As shown in FIG. 1, the width of the pixel electrode in a direction parallel to the slit 4 formed in the pixel electrode 3 for forming the electrode portions 3a, 3b, and 3c is W ₁ and the slit 4. ), width (W ₂₎ is the electrical of the connecting portion 5 of the connecting portion (5) when the width of the connecting portion 5 of the left electrode portions adjacent to each other (3a, 3b, and 3b, 3c) between a W ₂ a The resistance is formed to be narrower than 1/5 with respect to the width W ₁ of the pixel electrode in a range not exceeding the allowable value. More preferably, the width W ₂ of the connection portion 5 and the width W ₁ of the pixel electrode are

W ₂ / W ₁ ≤0.13

It is set to a value satisfying.

That is, in this embodiment, the width W ₂ of the connecting portion 5 is 13/100 or less of the width W _{1 in} the direction parallel to the slit 4 of the electrode portions 3a, 3b, 3c. In addition, the electrical resistance value of the connection part 5 is set to the value which does not exceed an allowable range.

Peripheral edges corresponding to the pixel electrodes 3 of each row on the substrate surface of the late board 1 so as to exclude the vicinity of the portion where the source electrode 11 of the TFT 6 of the pixel electrode 3 is connected. A compensation capacitor electrode 14 is formed in the portion facing the gate insulating film 8 and forming a compensation capacitor having the gate insulating film 8 as a dielectric layer between the pixel electrodes 3.

In addition, the compensation capacitor electrode 14 is disposed to be insulated from the pixel electrode so as to correspond to a peripheral edge of the pixel electrode 3 so that a part thereof overlaps, and has a predetermined width outside the peripheral edge of the pixel electrode 3. It is formed in the shape extended.

The compensation capacitor electrodes 14 respectively corresponding to the pixel electrodes 3 of each row are integrally connected to each pixel electrode row on the opposite side to the TFT connection side of the pixel electrode 3, and each row Compensating capacitor electrode 14 extends to an area outside of the array region of the plurality of pixel electrodes 3 and is common to a capacitor electrode connection wiring (not shown) disposed at one end or both ends in parallel with the data wiring 13. Connected.

In addition, an overcoat insulating film 15 covering the plurality of TFTs 6 and the data wirings 13 is provided on the inner surface of the late plate 1 except for portions corresponding to the plurality of pixel electrodes 3. The vertical alignment film 16 is formed thereon.

On the other hand, the inner surface of the electric plate 2 is formed of an area where a plurality of pixel electrodes 3 provided on the inner surface of the late plate 1 and the counter electrode 17 provided on the inner surface of the electric plate 2 face each other. A black mask 18 having a lattice shape facing the area between the pixels and three color filters 19R, 19G, and 19B of red, green, and blue corresponding to each pixel are provided. The color filter 19R is provided. , 19G, 19B, and the counter electrode 17 are formed, and a vertical alignment film 20 is formed thereon.

The late board 1 and the electric plate 2 are joined through a frame-shaped sealing material (not shown) that surrounds the array area of the plurality of pixel electrodes 3.

In addition, although the latter board 1 is not shown in figure, one end of the row direction and one end of a column direction have the inner part which protrudes outward of the electric board 2, respectively, The gate-side driver connection terminals are arrayed, and the plurality of data-side driver connection terminals are arrayed at the inner side extending in the column direction.

The plurality of gate wirings 12 are led to the extending portions in the row direction, respectively, and are connected to the plurality of gate side driver connection terminals, and the plurality of data wirings 13 are led to the extending portions in the column direction. Capacitive electrode connection wirings (not shown), which are respectively connected to the plurality of data side driver connection terminals, to which the compensation capacitor electrodes 14 in each row are commonly connected, are connected to one or both of the inner extension portions in the row direction and the column direction. It is derived and connected to a potential supply terminal (not shown) of a predetermined potential among the plurality of driver connection terminals of the inner portion.

In addition, the inner surface of the late board 1 is led to one or both of the inner extending portions in the row direction and the column direction from near the corner portions of the substrate bonding portion (not shown) by the sealing material, and to the potential supply terminal in the driver connecting terminal. A counter electrode connection wiring (not shown) is provided, and a counter electrode 17 provided on the inner surface of the electric plate 2 is connected to the counter electrode connection wiring at the substrate joining portion, and the counter electrode connection wiring is connected. It is connected to the said potential supply terminal through the. That is, the potentials of the plurality of compensation capacitor electrodes 14 are set to the same values as the potentials of the counter electrode 17.

The liquid crystal layer 21 is enclosed in an area surrounded by the sealing material between the late plate 1 and the electric plate 2, and the liquid crystal molecules 21a of the liquid crystal layer 21 are positive substrates. The vertical alignment of the vertical alignment films 16 and 20 provided on the inner surfaces of (1, 2) is oriented substantially perpendicular to the surfaces of the substrates 1 and 2, respectively.

Moreover, the polarizing plates 22 and 23 are arrange | positioned on the outer surface of the said late board 1 and the electric board 2 so that the transmission axis may face to a predetermined direction previously, respectively. In this embodiment, the polarizing plates 22 and 23 are arranged so that their transmission axes are substantially orthogonal to each other, and the liquid crystal display element is displayed in the normally black mode.

The liquid crystal display element is provided with a slit 4 which is divided into a plurality of electrode portions 3a, 3b, and 3c, which are connected to each other in the connecting portion, respectively, to the plurality of pixel electrodes 3 to form the liquid crystal molecules 21a of each pixel. The application of the voltage between the pixel electrode 3 and the counter electrode 17 causes the collapsing alignment of the respective regions corresponding to the plurality of electrode portions 3a, 3b, 3c. The liquid crystal display device has a width W ₁ of the plurality of electrode portions 3a, 3b, and 3c of the pixel electrode 3 and a width W of the connection portion 4 of the electrode portions 3a, 3b, and 3c. ₂ ) is set to W ₂ / W ₁ ≤ 0.13. Therefore, the liquid crystal molecules 21a of each pixel are applied to each of the regions corresponding to the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3 by the application of the voltage. It can be regularly deflected towards the center.

That is, FIG. 4 schematically illustrates the liquid crystal molecule alignment state when voltage is applied to each of the regions corresponding to the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3 in the liquid crystal display element of the embodiment. It is a top view shown by the enemy. As shown in FIG. 4, the widths W ₁ of the plurality of electrode portions 3a, 3b, and 3c of the pixel electrode 3 and the widths of the connection portions 4 of the electrode portions 3a, 3b, and 3c ( The liquid crystal display of the embodiment in which W ₂ ) is set to W ₂ / W ₁ ≤ 0.13 is provided to the electrode portions 3a, 3b, 3b, and 3c adjacent to each other with the slit 4 of the pixel electrode 3 therebetween. The liquid crystal molecules 21a of the corresponding regions are oriented almost without affecting each other in the portions corresponding to the connecting portions 5, and the liquid crystal molecules 21a of the respective regions are arranged in a plurality of the pixel electrodes 3, respectively. The respective regions corresponding to the electrode portions 3a, 3b, and 3c fall down on a regular basis from the circumferential edge of the region toward the center of the interposed region.

On the other hand, with respect to the width W ₁ of the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3, the width W ₂ of the connection portion 4 of the electrode portions 3a, 3b, 3c is determined. When larger than 1/5, the liquid crystal molecules 21a in the regions corresponding to the electrode portions 3a, 3b, 3b, and 3c adjacent to each other with the slit 4 of the pixel electrode 3 interposed therebetween are connected to the connection portion 5. In the part corresponding to), the liquid crystal molecules 21a of the neighboring electrode parts 3a and 3b are arranged so as to fall in the same direction. Not obtained. The ratio of the width W ₂ of the connection portion 4 of the electrode portions 3a, 3b, 3c to the width W ₁ of the electrode portions 3a, 3b, 3c is sufficient when W ₂ / W ₁ > 0.13. Stable orientation is not obtained.

This embodiment of the liquid crystal display element thus has a ratio of width (W ₂₎ of the connection portion 4 of the width of the electrode portion (3a, 3b, 3c) to (W ₁₎ of the electrode (3a, 3b, 3c) W 2 By setting / W ₁ ≤ 0.13, the peripheral edge of each liquid crystal molecule 21a of each pixel corresponding to the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3 by applying the voltage It can be satisfactorily collapsed from the part toward the center and an image of good quality without roughness can be displayed.

In addition, the liquid crystal display element has a plurality of electrode portions 3a, 3b, and 3c of the pixel electrode 3 substantially in a square shape, and therefore, the plurality of electrode portions 3a and 3b of the pixel electrode 3 are formed. , The liquid crystal molecules 21a of the respective regions corresponding to 3c can be satisfactorily collapsed from the periphery of the respective regions toward the center of the respective regions, and thus, the plurality of electrode portions 3a, of the pixel electrode 3 can be aligned. The fall-out orientation of the liquid crystal molecules 21a for each region corresponding to 3b and 3c can be more stabilized, and an image of good quality can be displayed.

In addition, the liquid crystal display device has a slit 4 that divides the pixel electrode 3 into a plurality of electrode portions 3a, 3b, and 3c on the plurality of pixel electrodes 3, and the slit 4 Since the width is 4.0 µm or less as described above, a sufficient aperture ratio can be obtained.

(Second embodiment)

Fig. 5 is a plan view of a part of one substrate of the liquid crystal display device showing the second embodiment of this invention. In addition, in this embodiment, the same code | symbol is attached | subjected to the same member as 1st Example mentioned above, and the description is abbreviate | omitted.

In the liquid crystal display device of this embodiment, the plurality of pixel electrodes 3 are formed in an elongated shape having short sides along the row direction and long sides along the column direction, and one end of the short sides of the plurality of pixel electrodes 3. A plurality of pixel electrodes 3 side by side in the long side direction while connecting the source electrodes 11 of the TFTs 6 to each other, and having the pixel electrode 3 along the width direction (short side direction). For example, the slit 41 is divided into three electrode portions 3a, 3b, and 3c, and the neighboring electrode portions 3a, 3b, 3b, and 3c are disposed with the slit 41 therebetween. The connection part 51 shift | deviated to either side from the center part of the width | variety of the direction parallel to the said slit 41 of the said electrode part 3a, 3b, 3c to the one of the width direction of the said electrode part 3a, 3b, 3c. The other configuration is the same as that of the liquid crystal display element of the first embodiment described above.

In this liquid crystal display device, among the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3, at least the electrode portion 3a to which the TFT 6 is connected and the electrode portion 3a are mutually different. The connection part 51 of the neighboring electrode part 3b is formed in the other end side on the opposite side to the short side direction with respect to one end of the short side to which the said TFT 6 was connected.

In this embodiment, the electrode portion 3a to which the TFT 6 on one end side of the pixel electrode 3 is connected and the connecting portion 51 of the electrode portion 3b in the center adjacent to each other with the electrode portion 3a are connected. And connecting portions 51 of the central electrode portion 3b and the electrode portion 3c on the other end side of the pixel electrode 3, respectively, on the opposite side to one end side of the short side to which the TFT 6 is connected. Doing.

This liquid crystal display element is composed of a plurality of electrode portions 3a, 3b, 3c connected to each other at a portion of the edge portion adjacent to each other to the plurality of pixel electrodes 3, similarly to the first embodiment. The plurality of electrode portions 3a, 3b, and 3c are formed by applying a voltage between the pixel electrode 3 and the counter electrode 17 to the liquid crystal molecules 21a of each pixel by providing a slit 41 for separating. Collapsed in each area corresponding to).

In the liquid crystal display element of this embodiment, the connecting portion 51 is positioned in the width direction of the electrode portions 3a, 3b, and 3c from the center portion of the width parallel to the slit 41 of the electrode portions 3a, 3b, and 3c. Since either is formed at the position shifted to one side, the influence which the orientation of the liquid crystal molecule 21a of the electrode part 3a has on the liquid crystal molecule 21a of the electrode parts 3b and 3c can be reduced, The liquid crystal molecules 21a in each region are regularly collapsed toward the center of the region from the periphery of the region for each region corresponding to the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3. In addition, an image of good quality without roughness can be displayed.

   This liquid crystal display element is adjacent to the electrode portion 3a to which the TFT 6 is connected, and the electrode portion 3a, at least among the plurality of electrode portions 3a, 3b, and 3c of the pixel electrode 3. Since the connecting portion 51 of the electrode portion 3b is formed on the side opposite to the connecting side of the TFT 6, the electrode portion 3a is provided by the gate signal supplied to the electrode (especially the gate electrode) of the TFT 6. The liquid crystal molecules 21a in the region corresponding to the electrode portions 3b adjacent to each other with the slits 41 of the pixel electrodes 3 interposed between the alignment of the liquid crystal molecules generated by the electric field generated near the TFT Can be prevented from being affected, and the disturbance of the alignment of the liquid crystal molecules 21a of the electrode portion 3b can be virtually eliminated.

FIG. 6 shows the voltage applied to each region corresponding to the electrode portions 3a, 3b, 3c by the position of the connection portions 51 of the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3. It is a top view which shows typically the liquid crystal molecule improvement state, and as shown in FIG. 6, the said connection part 51 is between the gate electrode 7 of the said TFT 6, and the TFT adjacent edge of the said electrode part 3a. The liquid crystal molecules 21a in the region corresponding to the electrode portion 3a to which the TFT 6 is connected are located on the opposite side to the extension line in the direction of the transverse electric field generated in the gate electrode 7 of the TFT 6. The orientation is collapsed regularly from the circumferential edge of the region toward the center without hardly causing the disturbance of the orientation due to the influence of the transverse electric field generated between the electrode portion 3a and the electrode portion 3a.

Therefore, the liquid crystal molecules 21a of each region including the region corresponding to the electrode portion 3a to which the TFT 6 is connected are stably collapsed and oriented toward the center from the peripheral portion of each region, and have good quality. Can display an image.

In the liquid crystal display device of this embodiment, it is preferable that the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3 are formed in a substantially square shape, and in this manner, the pixel electrode 3 The liquid crystal molecules 21a of the respective regions corresponding to the plurality of electrode portions 3a, 3b, and 3c of the can be oriented in a balanced manner from the peripheral edge to the center for each of the regions.

In the liquid crystal display device of this embodiment, the width of the connection portion 51 is the width in the direction parallel to the slit 41 of the electrode portions 3a, 3b, 3c as in the first embodiment. ₁ , when the width of the connecting portion 51 is set to W ₂ , it is preferable to set the value of W ₂ / W ₁ ≤ 0.13. By doing so, the liquid crystal molecules 21a of each pixel are applied by applying voltage. Each region corresponding to the plurality of electrode portions 3a, 3b, and 3c of the pixel electrode 3 can be more stably collapsed from the peripheral edge toward the center.

In addition, the width of the slit 4 of the pixel electrode 3 is preferably equal to or less than 4.0 μm, whereby a sufficient aperture ratio can be obtained.

(Third embodiment)

Fig. 7 is a plan view of one pixel portion of one substrate of the liquid crystal display device showing the third embodiment of this invention. In addition, in this embodiment, the same code | symbol is attached | subjected to the member similar to said 1st and 2nd Example, and the description is abbreviate | omitted.

In the liquid crystal display device of this embodiment, at least three or more (three in this embodiment) electrode portions 3a, 3b, which parallel the pixel electrodes 3 to the elongated pixel electrode 3 in the longitudinal direction thereof, A plurality of slits 42 divided by 3c are provided, and among the electrode portions 3a, 3b, 3c of the pixel electrode 3, the electrode portion 3a to which the TFT 6 is connected and the electrode portion The connection part 52 of the electrode part 3b which adjoins (3a) is formed in the opposite side to the connection side of the said TFT 6, and the odd slit 42 from the connection side of the said TFT 6 is carried out. Connecting portions 52 of two electrode portions 3a and 3b adjacent to each other with a gap between them, and connecting portions of two electrode portions 3b and 3c adjacent to each other with an even slit 42 therebetween. The other configuration is the same as in the second embodiment.

That is, the liquid crystal display element includes an electrode portion 3a to which the TFT 6 on one end side of the pixel electrode 3 is connected among the electrode portions 3a, 3b, and 3c of the pixel electrode 3, and the same. The connecting portion 52 of the electrode portion 3b adjacent to each other with the electrode portion 3a is formed on the other end side opposite to the short side direction with respect to one end of the short side to which the TFT 6 is connected, The connecting portion 52 between the center electrode portion 3b and the electrode portion 3c on the other end side of the pixel electrode 3 is formed on the side to which the TFT 6 is connected. According to the liquid crystal display device, the connection portions 52 are alternately formed on opposite sides of the long sides of the pixel electrode, so that each of the regions corresponding to the plurality of electrode portions 3a, 3b, 3c of the pixel electrode 3 is formed. The influence of the liquid crystal molecules on each other can be minimized, and the respective regions of each pixel portion can be oriented more stably from the circumferential edge portion toward the center than in the second embodiment.

(Example 4)

8 is a plan view of one pixel portion of one substrate of the liquid crystal display device according to the fourth embodiment of the present invention. In this embodiment, the same reference numerals are given to the same members as those of the first and second embodiments described above, and the description thereof is omitted.

In the liquid crystal display device of this embodiment, the plurality of pixel electrodes 3 are formed in a substantially rectangular shape, and the source electrode of the TFT 6 is formed at one side of one edge of the pixel electrode 3 in the longitudinal direction. (11) is connected, and the pixel electrode 3 is arranged along the length direction and the width direction so that the pixel electrode 3 is arranged in two rows in the width direction, and at least two rows in the length direction for each column. For example, a plurality of slits 43 and 44 divided into a plurality of electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , and 3c ₂ arranged in three rows are provided, and the plurality of Between each of the electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c ₂ and at least one of the electrode portions adjacent to each other in the same column as the electrode portion and adjacent electrode portions in the same row. the connecting electrode portion adjacent to each other (53, 54) for the electrode portion _{(3a 1, 3a 2, 3b} 1, 3b 2, 3c 1, 3c 2) the slit (43, 44) of the From the center of the width direction performed it will formed in a position shifted to either side of the width direction of the electrode, and the other configuration is the same as in the above-described first example.

In this embodiment, one longitudinal slit 43 is provided at the center of the width direction (short side direction) of the pixel electrode 3, and the length (long side direction) of the pixel electrode 3 is substantially changed. The width direction slit 44 is provided in two places which divide into 3 equal parts. Connection portions 53 are formed at both ends of the longitudinal slit 43, and among the two widthwise slits 44, close to the TFT 6 of the widthwise slit 44 on the TFT 6 side. The end of the side reaches to the edge of the pixel electrode 3, and a connecting portion 54 is formed on the side far from the TFT on the opposite side, and both ends of the widthwise slit 44 far from the TFT 6 are formed. Each said connection part 54 is formed. By this structure, all the electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c ₂ , which are arranged side by side in the second row and the third row, are sequentially connected through the connecting portions 5a, 5b. have.

The liquid crystal display element is each of the plurality of electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c ₂ , adjacent electrode portions in the same column as the electrode portions, and adjacent to each other in the same row. The connecting portions 53 and 54 which connect the adjacent electrode portions to at least one of the electrode portions are either in the width direction of the electrode portion from the center portion of the width in a direction parallel to the slit 43 44 of the electrode portion. Since it is formed at a position shifted to one side of the application, similarly to the liquid crystal display elements of the second and third embodiments described above, the liquid crystal molecules of each pixel are applied to the plurality of electrode portions 3a ₁ , of the pixel electrode 3 by applying a voltage. Each region corresponding to 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c ₂ ) can be stably oriented from the circumferential edge toward the center and an image of good quality without roughness can be displayed.

In addition, among the plurality of electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c ₂ , the liquid crystal display device includes at least an electrode portion 3a _{1 to} which a TFT 6 is connected and an electrode portion thereof. The connecting portion 53 of the electrode portion 3a ₁ adjacent to each other (in this embodiment, the electrode portion neighboring each other in the row direction) 3a ₂ is connected to the gate electrode 7 and the TFT 6 of the TFT 6. Is formed at a position (short side portion of the pixel electrode 3 in this embodiment) avoiding the extension line of the transverse electric field generated between the edges of the electrode portions 3a _{1 to} which the electrodes are connected. Due to the influence of the transverse electric field generated between the gate electrode 7 and the electrode portion 3a ₁ of the TFT 6 in a region corresponding to the electrode portion 3a ₁ to which the TFT 6 is connected The disturbance of the alignment of the liquid crystal molecules does not affect the alignment of the liquid crystal molecules corresponding to the adjacent electrode portions 3a ₂ , and a stable alignment state is obtained for each pixel portion.

In this embodiment, the connecting portions 53 and 54 of the plurality of electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c ₂ of the pixel electrode 3 are formed at positions shown in FIG. 8. However, the positions and numbers of the connecting portions 53 and 54 may be other positions and numbers as long as all the electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c ₂ can be connected.

In the liquid crystal display device of this embodiment, the plurality of electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c _{2 of} the pixel electrode 3 are each formed substantially in a square shape. In this way, the liquid crystal molecules of the respective regions corresponding to the plurality of electrode portions 3a ₁ , 3a ₂ , 3b ₁ , 3b ₂ , 3c ₁ , 3c ₂ of the pixel electrode 3 are separated for each of the regions. From the circumference to the center, it can fall down in a balanced manner.

In the liquid crystal display device of this embodiment, the width of the connection portions 53 and 54 is parallel to the slits 43 and 44 of the electrode portions 3a, 3b and 3c as in the first embodiment. When the width of W _{1 is set} to W ₂ and the width of the connecting portion 5 is set to W ₂ , it is preferable to set the value of W ₂ / W ₁ ≤ 0.13. Thus, the liquid crystal molecules of each pixel are applied to the application of the write voltage. As a result, each area corresponding to the plurality of electrode portions 3a, 3b, and 3c of the pixel electrode 3 can be oriented more stably from the peripheral edge toward the center.

In addition, the width of the slits 43 and 44 of the pixel electrode 3 is preferably equal to or less than 4.0 μm, whereby a sufficient aperture ratio can be obtained.

(Example 5)

9 is a plan view of one pixel portion of one substrate of the liquid crystal display device according to the fifth embodiment of the present invention. This liquid crystal display element is the liquid crystal display element of the second embodiment shown in Fig. 6, wherein the liquid crystal display element is formed between the substrate surface of the late plate 1 on which the plurality of pixel electrodes 3 are provided and the formation surface of the pixel electrode 3. Auxiliary electrodes 141 corresponding to the slits 41 of the plurality of pixel electrodes 3, respectively, are formed between the counter electrodes 17 of the electric plate 2 to form a substantially electroless region. A predetermined potential is supplied to the auxiliary electrode 141, and the auxiliary electrode 141 is set to the counter electrode 17 and the coin head. In this embodiment, the auxiliary electrode 141 is integrally formed with the compensation capacitor electrode 14 forming a compensation capacitor between the edges of the plurality of pixel electrodes 3.

In this embodiment, the same members as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

The liquid crystal display device of this embodiment is the liquid crystal display device of the first embodiment shown in Figs. 1 to 3, the liquid crystal display device of the third embodiment shown in Fig. 7, or the liquid crystal display device of the fourth embodiment shown in Fig. 8 in the auxiliary electrode. 141 may be provided.

The liquid crystal display element is respectively provided in the slits 41 of the plurality of pixel electrodes 3 between the substrate surface of the late plate 1 on which the plurality of pixel electrodes 3 are provided and the forming surface of the pixel electrode 3. Correspondingly, an auxiliary electrode 141 is formed between the counter electrodes 17 of the electric plate 2 to form a substantially electroless region. Accordingly, a portion corresponding to the slit 41 of the pixel electrode 3, that is, a portion corresponding to the electrode portions 3a, 3b and 3b and 3c adjacent to each other with the slit 41 interposed therebetween. The liquid crystal molecules are oriented substantially perpendicular to the surface of the substrates 1 and 2, and the liquid crystal molecules of each pixel correspond to the plurality of electrode portions 3a, 3b, and 3c of the pixel electrode 3 by applying a voltage. Each area can be more satisfactorily collapsed from the circumferential edge toward the center.

In this embodiment, since the auxiliary electrode 141 is integrally formed with the compensation capacitor electrode 14, the compensation capacitor electrode 14 and the auxiliary electrode 141 are formed separately from the metal film. The manufacturing of the liquid crystal display device can be facilitated.

(Example 6)

10 to 14 show a sixth embodiment of the present invention, FIG. 10 is a plan view of a portion of one substrate of the liquid crystal display device, and FIG. 11 is a sectional view of the liquid crystal display device along the line XI-XI of FIG. 10, FIG. 12 is a cross-sectional view of the liquid crystal display device taken along the line II-II of FIG. 10.

In the liquid crystal display device of the first embodiment shown in FIG. 1, the liquid crystal display element is formed between the substrate surface of the later plate 1 on which the plurality of pixel electrodes 3 are provided and the surface on which the pixel electrode 3 is formed. An auxiliary electrode 142 corresponding to the slits 4 of the plurality of pixel electrodes 3, respectively, and substantially forming an area of the electroless field between the counter electrodes 17 of the electric plate 2, Further, protrusions are formed at portions corresponding to the centers of the respective electrode portions on the inner surface of the electric plate 2. A predetermined potential is supplied to the auxiliary electrode 142. In this embodiment, the auxiliary electrode 142 is set to the counter electrode 17 and the coin head. That is, the auxiliary electrode 142 is integrally formed with the compensation capacitor electrode 14 forming a compensation capacitor between the edges of the plurality of pixel electrodes 3.

In this embodiment, the same members as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

In this embodiment, a peripheral portion of the plurality of pixel electrodes 3 is disposed between the substrate surface of the later plate 1 and the forming surface of the pixel electrode 3 on the inner surface of the later plate 1, An auxiliary electrode arranged to be insulated from the pixel electrode in correspondence with a slit, and to face the counter electrode 17 of the electrical plate 2, and to form an electric field having a predetermined value between the counter electrode 17; 142 is provided. The auxiliary electrode 142 is provided along all edges of each of the electrode portions 3a, 3b, and 3c separated by the slits 4 of the pixel electrode 3, and is disposed between the pixel electrodes 3. It also serves as a compensation capacitor electrode for forming a compensation capacitor.

That is, the auxiliary electrode 142 corresponds to the circumferential edge except for the TFT connection portion of the pixel electrode 3 and the slit 4 on the substrate surface of the late plate 1 so as to correspond to the slit 4 of the pixel electrode 3. The inner circumferential edge of the upper portion corresponding to the circumferential portion of the upper portion of the frame electrode 3 overlaps with the circumferential edge of the pixel electrode 3, and the outer edge of the upper portion of the frame portion is arranged in the pixel electrode 3. A metal film having an outer shape extending outwardly and having both edge portions of portions corresponding to the slits 4 at widths opposite to edge portions of the electrode portions 3a, 3b, and 3c of the pixel electrode 3; And a portion of the metal film opposite to the pixel electrode 3 forms a compensation capacitance between the pixel electrode 3 and the gate insulating film 7 as a dielectric layer. Corresponding to inwardly extending portion and said slit 4 Minutes to form a region for generating an electric field of a predetermined value between said counter electrode (17).

In addition, the inner surface of the electric plate 2 corresponds to the center of each electrode portion 3a, 3b, 3c separated by the slits 4 of the plurality of pixel electrodes 3 of the late plate 1, respectively. At the position, a plurality of projections 25 made of a dielectric are provided.

The plurality of protrusions 25 are truncated cones having a diameter smaller toward the protruding end, for example, by a dielectric material such as photosensitive resin on the counter electrode 17. And a vertical alignment film 20 is formed on the projection 25 and the counter electrode 17 thereon.

In this liquid crystal display device, the electrode portions 3a, 3b, which are divided by the slits 4 of the plurality of pixel electrodes 3 of the late plate 1 on the inner surface of the electric plate 2 on which the counter electrode 17 is provided, Since a plurality of projections 25 corresponding to the center of 3c are respectively provided, each of the regions corresponding to the respective electrode portions 3a, 3b, and 3c is more stably from the peripheral edge toward the center of the region. It can fall down.

13 and 14 are a plan view and a cross-sectional view schematically showing a liquid crystal molecule alignment state when voltage is applied to one pixel of the liquid crystal display element, respectively. The liquid crystal display element has a liquid crystal molecule (in each region) corresponding to each of the electrode portions 3a, 3b, 3c of the pixel electrode 3 when a voltage is applied between the pixel electrode 3 and the counter electrode 17. 21a) are each guided by molecular orientation in the vicinity of the projections 25, and are oriented toward the projections 25 as shown in the figure, and eventually to fall toward the center of each of the regions, so that a better quality image is obtained. Can be displayed.

The liquid crystal display element is opposed to the counter electrode 17 of the electric plate 2 in correspondence with the slit 4 of the plurality of pixel electrodes 3 and has a predetermined value between the counter electrodes 17. Since the auxiliary electrode 142 for forming an electric field is provided, the liquid crystal molecules 21a in the respective regions corresponding to the electrode portions 3a, 3b, and 3c of the pixel electrode 3 even if the width of the slit 4 is small. ) Can be stably collapsed by applying the above voltage.

In addition, the liquid crystal display element is provided so that the auxiliary electrode 142 is provided along all edges of the electrode portions 3a, 3b, and 3c separated by the slits 4 of the pixel electrode 3, so that the liquid crystal molecules are provided. The 21a can be oriented more stably in each region corresponding to the electrode portions 3a, 3b, 3c of the pixel electrode 3.

In addition, since the auxiliary electrode 142 is set to substantially the same value as the potential of the counter electrode 17, the liquid crystal display element is substantially free of an electric field between the auxiliary electrode 142 and the counter electrode 17. FIG. The liquid crystal molecules 21a of the portion can be oriented substantially vertically as shown in Figs. 13 and 14, and thus the liquid crystal molecules 21a of each pixel can be more stably collapsed in each of the regions. .

Claims (20)

delete delete delete delete delete A pair of substrates facing each other by providing a predetermined gap; At least one counter electrode formed on an inner surface of one of the inner surfaces of the pair of substrates facing each other; It is formed in a rectangular shape having a short side and a long side, and a pair of the substrates are arranged in a matrix form in a row direction and a column direction on the inner surface of the other substrate, and in the regions facing the counter electrodes, respectively. Each pixel is defined by a plurality of electrode portions, and a predetermined width connecting the regions of the electrode portions adjacent to each other so as to divide the plurality of electrode portions into a plurality of sub-pixels arranged in the long side direction. At least one slit in which a part of the electrode is removed while leaving the connecting portion is formed, and the connecting portion is disposed at a position in which one of the width direction of the electrode portion is shifted from one side in the width direction of the pixel electrode of the portion in which the connecting portion is formed. A plurality of pixel electrodes, A plurality of thin film transistors disposed on an inner surface of the one substrate so as to correspond to the plurality of pixel electrodes, respectively, and connected to sides opposite to the side where the connection portion of the corresponding pixel electrode is formed; A plurality of gate wirings and data wirings provided on the inner surface of the one substrate between the rows and columns of the plurality of pixel electrodes, for supplying a gate signal and a data signal to the thin film transistors of the respective rows and columns; A vertical alignment film disposed on the inner surfaces of the one substrate and the other substrate to cover the pixel electrode and the counter electrode, respectively; And a liquid crystal layer having negative dielectric anisotropy enclosed in a gap between a pair of said substrates. The method of claim 6, Each pixel electrode is formed in an elongate shape having a short side and a long side, and a thin film transistor is connected to one end of the short side of the pixel electrode, and extends in a direction parallel to the short side of the pixel electrode. At least one slit for dividing the pixel electrode into a plurality of electrode portions is provided, and a connection portion connecting the plurality of electrode portions is provided on a long side of the pixel electrode opposite to a long side of the side to which the thin film transistor is connected. A liquid crystal display device, characterized in that formed. The method of claim 7, wherein The pixel electrodes have an elongated shape of three times the length of the long side with respect to the short side, and the at least two slits are provided to distinguish the at least three electrode portions in the long side direction of the pixel electrode. The connecting portions of the liquid crystal display element are alternately formed on opposite sides of the long side of the pixel electrode. The method of claim 6, The pixel electrode has a thin film transistor connected to one end of the short side of each pixel electrode, and the pixel electrode is arranged in two rows and two rows side by side along the short side direction and the long side direction. A plurality of slits which are divided into electrode portions are provided and are connected to each of the plurality of the electrode portions, the electrode portions adjacent to each other in the same row as the electrode portion and the electrode portions adjacent to each other in the same row. And an additional liquid crystal display element. The method of claim 9, The electrode portion of the plurality of electrode portions to which the thin film transistor is connected, and the connection portion connecting the electrode portion and the adjacent electrode portion to each other are formed on a short side other than the long side of the side to which the thin film transistor of the pixel electrode is connected. A liquid crystal display device characterized by the above-mentioned. The method of claim 6, And a plurality of electrode portions, each of which divides the pixel electrode, into a square shape. The method of claim 6, Disposed between the substrate surface of the other substrate provided with the plurality of pixel electrodes and the forming surface of the pixel electrode, insulated from the pixel electrode so as to overlap a part of the plurality of pixel electrodes so that a part thereof overlaps; And a compensation capacitor electrode which forms a compensation capacitor between the pixel electrode and a region of an electric field having a predetermined value between the counter electrode and the counter electrode. The method of claim 6, A predetermined value is formed between the counter electrode of the other substrate so as to correspond to the slits of the plurality of pixel electrodes between the substrate surface of the other substrate and the formation surface of the pixel electrode; A liquid crystal display device further comprising an auxiliary electrode for forming an electric field. The method of claim 6, A plurality of pixel electrodes are insulated from the substrate surface of the other substrate on which the plurality of pixel electrodes are installed and the forming surface of the pixel electrode so as to overlap a portion of the plurality of pixel electrodes so as to overlap a part of the pixel electrodes; A compensation capacitor electrode which forms a compensation capacitor between the pixel electrode and a region of an electric field of a predetermined value between the counter electrode; Between the substrate surface of the other substrate and the formation surface of the pixel electrode to be integrally formed with the compensation capacitor electrode in correspondence with the slits of the plurality of pixel electrodes, and between the counter electrode of the other substrate A liquid crystal display device further comprising an auxiliary electrode for forming an electric field of a predetermined value. The method of claim 6, When the width of the pixel electrode of the portion where the slit is formed is set to W ₁ , and the width of the connecting portion connecting one electrode electrode to the adjacent electrode portion is set to W ₂ , the width W ₁ of the pixel electrode and the width of the connecting portion are set. W ₂ W ₂ / W ₁ ≤0.13 A liquid crystal display device, characterized in that it is set to a value satisfying. The method of claim 6, The width of the slit of the pixel electrode is 4.0㎛ less liquid crystal display device. delete delete The method of claim 6, An auxiliary electrode formed between the substrate surface of the other substrate on which the plurality of pixel electrodes is provided and the forming surface of the pixel electrode, the auxiliary electrode formed corresponding to the peripheral edge of the plurality of pixel electrodes; And the potential of the auxiliary electrode is set to the same value. The method of claim 6, And a projection provided at a position corresponding to the center of each of the electrode portions separated by the slits of the plurality of pixel electrodes of the other substrate, on the inner surface of the one substrate on which the counter electrode is provided.

Images